CDTI not starting as crisp as it was

hobgoblin · 11th October 2016, 10:20

How long does the in tank pump run for and what should it sound like.I can hear the under bonnet pump whirring away but at the filler cap i can hear a sound like running water is this normal. Its a 53 plate with 104000 miles and is fully serviced Cheers chaps.

First_damned · 11th October 2016, 12:05

You can unplug the under bonnet fuel pump and then put the ignition on. You should hear a faint humming sound from the fuel tank with the cap off

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Lee T · 11th October 2016, 14:14

Hi, The running water sound is probably the UBP sucking air from the tank, take off the fuel line from the fuel filter end and put end in a bottle ignition pos 2 see if you get a strong flow with no air or get your fuel level up around half a tank and if it starts ITP is dead. Good luck. Lee

COLVERT · 11th October 2016, 19:07

Quote:

Originally Posted by hobgoblin

How long does the in tank pump run for and what should it sound like.I can hear the under bonnet pump whirring away but at the filler cap i can hear a sound like running water is this normal. Its a 53 plate with 104000 miles and is fully serviced Cheers chaps.

The pumps will run for 30 seconds or so.

Make sure you have well over quarter of a tank of diesel when running tests.

11th October 2016, 10:20	#1
hobgoblin Regular poster Rover 75 saloon Join Date: Oct 2012 Location: prescot Posts: 50 Thanks: 2 Thanked 0 Times in 0 Posts	CDTI not starting as crisp as it was How long does the in tank pump run for and what should it sound like.I can hear the under bonnet pump whirring away but at the filler cap i can hear a sound like running water is this normal. Its a 53 plate with 104000 miles and is fully serviced Cheers chaps.

11th October 2016, 14:14	#3
Lee T Gets stuck in MG ZT Join Date: Jul 2014 Location: Liverpool Posts: 857 Thanks: 180 Thanked 248 Times in 189 Posts	Hi, The running water sound is probably the UBP sucking air from the tank, take off the fuel line from the fuel filter end and put end in a bottle ignition pos 2 see if you get a strong flow with no air or get your fuel level up around half a tank and if it starts ITP is dead. Good luck. Lee __________________ [SIGPIC][/SIGPIC]

11th October 2016, 12:05	#2
First_damned Posted a thing or two Rover 75 Connoisseur CDTi Join Date: Aug 2013 Location: Birmingham Posts: 1,272 Thanks: 267 Thanked 100 Times in 93 Posts	You can unplug the under bonnet fuel pump and then put the ignition on. You should hear a faint humming sound from the fuel tank with the cap off Sent from my iPhone using Tapatalk